A Numerical Study of Decoupled Bubble Dynamics in Nucleate Boiling

Muhammad Sajid; Rachid Bennacer

doi:10.4028/www.scientific.net/DDF.283-286.329

Paper Titles

Simulation of a Liquid Droplet Impinging on a Horizontal Solid Substrate Using Lattice Boltzmann Moment Model
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Exhaust Thermal Energy Use and Optimization in Remote Areas
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Evaluation of Environmentally Friendly Zr Based Nano Structured Conversion Coating for HRS (Hot Rolled Steel) in Powder Coating
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Early Stage of Solid State Interfacial Reaction between Copper and Tin
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A Numerical Study of Decoupled Bubble Dynamics in Nucleate Boiling
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Applied Conditions for a Diffusion Electrochemical Method for Surface Streamlines Visualisation
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Study of Macrosegregation Defects Formation Caused by Double Diffusive Convective Flow during Solidification of a Binary Alloy
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Experimental and Numeric Study of Flow Around a Parallelepiped Obstacle Issued from a Bent Chimney
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Numerical Model for Multilayer Thin Films Irradiated by a Moving Laser Source
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A Numerical Study of Decoupled Bubble Dynamics in Nucleate Boiling

Abstract:

Nucleate boiling is an efficient mechanism of heat transfer. The rate of bubble growth and the subsequent bubble motion has a tremendous influence on heat transfer. The study of bubble dynamics is a coupled problem. The rate of evaporation controls the interface speed. One approach to study bubble dynamics is to decouple the problem from energy conservation equation and use an input value of rate of evaporation. The objective is to observe how irregular evaporation rate controls bubble dynamics and the shape of bubble and to study the local over-pressure. The level set method is used to track the liquid-vapor interface. The model consists of the Navier-Stokes equations which govern the momentum and mass balances and the level set equation which governs the interface motion due to phase change. The dynamics of a single bubble under different rates of evaporation and varying levels of gravity have been studied. The results of the numerical simulation show that this model adequately describes bubble dynamics in nucleate boiling, including conditions of microgravity.